<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>


<script>
    var arr=new  Array(5);
//    console.log(arr);
    var a={};
    var b={};
//    console.log(a==b);
    function c() {

    }
    console.log(c());

    function test1() {
        console.log(1)
        return 1
    }
    function test2() {
        console.log(2)
        break;
    }
    function test3() {
        console.log(3)
        test2()
        console.log(4)
    }
    test3()
</script>
</body>
</html>